How did the shopkeepers react after they refused Baba oil and then saw him light the lamps without it?

The shopkeepers' reaction evolved from arrogance to awe-filled repentance. As detailed in Chapter 5, the grocers first conspired with a 'wicked idea' to refuse Baba oil, viewing his daily requests as a 'nuisance.' After they collectively refused him, they watched to see what he would do, expecting to see him fail. However, when they witnessed the lamps burning brightly with water instead of oil, they were so amazed they 'put their fingers in their mouths.' Their amusement turned to fear and regret. They began to tremble, realizing they had sinned by lying to Baba and had given him needless trouble. This miracle prompted deep repentance among them.